# Zodiac Constellations Guide vs Astronomy Observer

The clearest difference is rating: Astronomy Observer at 4.6 against Zodiac Constellations Guide's 4.0. Astronomy Observer also leads on update cadence (monthly vs every 24 months) and iOS requirement (11.0 vs 15.0). Zodiac Constellations Guide's advantage is in-app purchases (none vs 3). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Astronomy Observer sells 3 in-app purchases, starting at $0.99 per month. Zodiac Constellations Guide asks for nothing beyond the download.

Astronomy Observer holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 38 and 28 respectively. Written reviews point the same way: 55% of Zodiac Constellations Guide's written reviews are positive against 58% of Astronomy Observer's.

Zodiac Constellations Guide ships an update every 24 months, Astronomy Observer monthly. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Zodiac Constellations Guide | Astronomy Observer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (38 ratings)](https://appshunter.io/ios/app/zodiac-constellations-guide/id1215627387/reviews) | **[4.6 (28 ratings)](https://appshunter.io/ios/app/astronomy-observer/id1508968890/reviews)** |
| Number of ratings | **38** | 28 |
| Positive reviews | 54.5% of reviews | **58.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 24 months | **Monthly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 155 MB | 51 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vito Technology Inc.](https://appshunter.io/developer/289641503) | [雪平 王](https://appshunter.io/developer/1045915049) |

## What reviewers say

### Zodiac Constellations Guide

[App page](https://appshunter.io/ios/app/zodiac-constellations-guide/id1215627387)

Explore the night sky and discover the 12 zodiac constellations with stunning 3D models. Rotate, zoom, and compare them to real star patterns. Perfect for astronomy and astrology enthusiasts.

**Highlights:** Interactive 3D constellation models, Zoom and rotate functionality, Compare models to night sky, Information on zodiac sign dates, Stunning graphics and visual effects

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Astronomy Observer

[App page](https://appshunter.io/ios/app/astronomy-observer/id1508968890)

This app helps astronomical observers plan their viewing sessions by calculating and displaying the positions of celestial bodies. It offers AR views, a catalog of stars and deep sky objects, and an astronomical event calendar. Premium features include ad-free viewing and access to a year of ephemeris data.

**Highlights:** AR celestial body positioning, Daily sun-moon position and planet rise/set, Catalog of stars, planets, and deep sky objects, Astronomical event calendar, Yearly ephemeris calculation, Constellation and star identification

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly membership | $0.99 | per month |
| Annually Membership | $5.99 | per year |
| lifetime membership | $14.99 | one-time |


## Frequently asked questions

### Is Zodiac Constellations Guide free?

Zodiac Constellations Guide is free to download, with no in-app purchases.

### Is Astronomy Observer free?

Astronomy Observer is free to download, with in-app purchases available.

### Which has better reviews, Zodiac Constellations Guide or Astronomy Observer?

Astronomy Observer is rated higher. Zodiac Constellations Guide averages 4.0 out of 5 from 38 ratings, while Astronomy Observer averages 4.6 from 28 ratings.

### Do Zodiac Constellations Guide or Astronomy Observer have ads?

Both Zodiac Constellations Guide and Astronomy Observer show ads.

### Which is updated more often, Zodiac Constellations Guide or Astronomy Observer?

Zodiac Constellations Guide ships an update every 24 months, and Astronomy Observer monthly. Most recently, Zodiac Constellations Guide was updated on October 22, 2026 and Astronomy Observer on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*